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  • Connection timed out (0x4c126035) Connecting to vDisk on Citrix Provisioning Services Server

    August 15, 2011

    PVS

    In Citrix Provisioning Services 5.6 SP1, when setting a new device to boot from vDisk using XenServer 5.6 SP2, the following error was received (Figure 1):

    Could not boot from filename “ardpb32.bin”: Connection timed out (0x4c126035)

    Figure 1
    Figure 1

    Performing a search via an Internet search engine returned various solutions for older versions of XenServer and also recommendations to disable all TCP Offloading in the master image from the vDisk is created.  TCP Offloading had already been disabled in the master image.  Another suggestion was to verify that DHCP Option 60 was not set.  I verified that Option 60 was not set (Figure 2).

    Figure 2
    Figure 2

    Now that the Internet has been used for help, time to turn to check the obvious.  Citrix Provisioning Services uses TFTP and this runs as a service.  Is the TFTP service running?  Look at Figure 3.

    Figure 3
    Figure 3

    Somehow the TFTP Service was stopped.  There is nothing in either the Application or System event logs to indicate why the service either stopped or didn’t start when the PVS Server was powered on.  Starting the TFTP Service and then restarting the Virtual Machine that is receiving the streamed vDisk fixed the error (Figure 4).

    Figure 4
    Figure 4
    Connection timed out (0x4c126035), PVS





    About Carl Webster

    Webster is a Sr. Solutions Architect for Choice Solutions, LLC and specializes in Citrix, Active Directory and Technical Documentation. Webster has been working with Citrix products for many years starting with Multi-User OS/2 in 1990.

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    7 Responses to “Connection timed out (0x4c126035) Connecting to vDisk on Citrix Provisioning Services Server”

    1. PVSAdmin Says:
      August 2, 2013 at 7:34 am

      We encountered the same error despite we have the TFTP/PXE services running on the PVS server.

      Client boots from network to DHCP, able to get PXE but when while getting the ARDBP32.BIN file it failing with timeouts.

      Any further thoughts?

      Reply

      • Carl Webster Says:
        August 2, 2013 at 10:32 am

        What version of PVS? Look at these:

        http://support.citrix.com/article/CTX131484
        http://support.citrix.com/article/CTX133332

        Webster

        Reply

        • Jay Says:
          June 9, 2015 at 3:12 pm

          Hi Carl,

          Excellent info! I however am not getting past it. I am on PVS 7.1, have the services running, everything in the wizard is configured correctly, but still getting the error.

          The weird thing is SOMETIMES it will boot correctly, then 5,10, 60 mins later it will randomly not boot correctly. Any ideas?

          Reply

          • Carl Webster Says:
            June 16, 2015 at 10:22 am

            Sorry for the delayed response. The only time I have seen this random issue is when the necessary registry keys for both client and server have not been done.

            http://support.citrix.com/article/CTX117374

            Thanks

            Webster

            Reply

    2. Adam Says:
      January 10, 2013 at 1:40 pm

      in my case I have 2 PVS Servers with NetScaler “load balance” TFTP VIP and I found that I forgot to check the source ip box. it’s all working now. Thanks for this post.

      Reply

      • Gonzalo Abarza Says:
        February 10, 2015 at 9:28 am

        Adam,

        In my case i found that i forgot to check the “Use Client IP” in the “Load balance Group”

        Thanks!

        Reply

    3. Graham Says:
      August 26, 2012 at 6:47 pm

      Hi Carl,

      “Me too” on PvS 6.0.1 on XenServer 6.0.2. The only message was one at boot time saying the service started. I’ve set the service to restart on failure see if that helps.

      Graham

      Reply

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